Heat transfer and friction characteristics of double pass solar air heater having V-shaped roughness on the absorber plate

2013 ◽  
Vol 5 (2) ◽  
pp. 023109 ◽  
Author(s):  
Avdhesh Sharma ◽  
Varun ◽  
Prashant Kumar ◽  
Gaurav Bharadwaj
Keyword(s):  
Heat Transfer ◽  
Solar Air Heater ◽  
Absorber Plate ◽  
Double Pass ◽  
Friction Characteristics ◽  
Air Heater

scholarly journals EFFECT OF ARTIFICIAL ROUGHNESS ON HEAT TRANSFER AND FRICTION CHARACTERSTICS OF DOUBLE PASS SOLAR AIR HEATER

2013 ◽  
pp. 52-56
Author(s):  
AVDHESH SHARMA ◽  
VARUN VARUN ◽  
GAURAV BHARADWAJ
Keyword(s):  
Heat Transfer ◽  
Nusselt Number ◽  
Friction Factor ◽  
Solar Air Heater ◽  
Rectangular Duct ◽  
Artificial Roughness ◽  
Absorber Plate ◽  
Double Pass ◽  
Air Heater ◽  
Aluminium Wire

Double pass solar air heater (DPSAH) consisted of rectangular duct provided with artificial roughness on both side of the absorber plate has been experimentally investigated. Circular ribs of aluminium wire is used to provide roughness to increase heat transfer coefficient between absorber plate and air. Ribs are attached to absorber plate at four different angle of attackbetween 30° to 75° . Experiment is carried out over the range of Reynolds Number from 4900 to 12000, and relative roughness height (e/Dh) varies from 0.022 to 0.044. Experimentally different values of Nusselt number(Nu). and friction factor(fr) have been determined for various parameters. The enhance-ment in heat transfer and increment in the friction factor values of Nusselt number and friction factor have also been compared with the smooth one.

Sign in / Sign up

Export Citation Format

Share Document